/Engine/Source/Runtime/Engine/Public/WorldPartition/DataLayer/WorldDataLayers.h
Allows overriding of DataLayers with PlayFromHere.
template<class T> void OverwriteDataLayerRuntimeStates ( const [TArray](API\Runtime\Core\Containers\TArray)< T > * InActiveDataLayers, const [TArray](API\Runtime\Core\Containers\TArray)< T > * InLoadedDataLayers )